VSB – Technical University of Ostrava
Selected parts of LSH research 17. Listopadu 15, Ostrava – Poruba, 708 33,Tel:+420597324379
IČO: 61989100, DIČ: CZ61989100
Prof. Jiri Zegzulka, Dr. Jan Necas
Lucie Jezerska, Jan Vyletelek, Jiri Rozbroj
Daniel Gelnar, Martin Žídek et al
Content:
1. Basic equipment of LSH - introduction
2. DEM Simulations and practical applications
3. Another research
19th International Conference, Energy and Environment 2015
LABORATORY OF BULK MATERIALS
Measuring of mechanical-physical properties
Powders are used to produce many of products. The
first part is focused on the following questions:
1. What aspects of powder behavior are interesting
from an industrial perspective? For various
industries.
2. Why do powders flow, or stop flowing? What is
their flowability?
3. What parameters affect how powders behave in a
process, during transport or as a product?
POWDERS
This universal powder tester combines the Freeman patented technology for
measuring of flow energy with a range of shear cells, wall friction modules and other
accessories for measuring of bulk properties. The methodology allows measurement
of:
• Flow energy in relation to many variables and all packing states.
• Shear properties of consolidated and unconsolidated powders.
• Bulk properties – precision bulk density, compressibility and permeability.
• Process variables such as moisture, attrition and segregation.
FT4 POWDER RHEOMETER SYSTEM
LABORATORY OF BULK MATERIALS
Powder rheometer FT4
www.freemantech.co.uk
Flowability, angle of internal friction
PARTICLE SIZE ANALYZER CILAS - 1190
• Particle size distributions
(cumulative and distribution
curve, median, mode, etc.)
• Measuring the number of
particles
• Particle Shape analysis
• Statistical assessment
• Ultrasonic treatment
LABORATORY OF BULK MATERIALS
The particle-size-analyzer sets with its integrated
wet and dry dispersion modes, CCD camera and
short optical path make it the most versatile
instrument available anywhere. The unique design
of the Cilas 1190 provides a measurement range
from 0.04 to 2,500 µm while maintaining an
extremely small footprint.
Particle size analyzer Cilas 1190
The particles are measured by capturing the diffraction
pattern and applying Fraunhofer or Mie theory.
www.cilas.com
Rotating nosepiece
MEASUREMENTS RESULTS
ROTATIONAL RHEOMETER KINEXUS
Shear cell Rotational rheometer Kinexus
LABORATORY OF BULK MATERIALS
A rheometer is a laboratory device used to measure the way in which a liquid,
suspension or slurry flows in response to applied forces. Kinexus enables to
precisely analyze the rheology, or flow and deformation properties of materials:
• From liquids to solids.
• From processability to product performance.
• From temperature to time dependence.
• From simple viscosity to complex viscoelastic parameters.
www.malvern.com/kinexus
User interaface
Dependence of viscosity on temperature
HIGH SPEED CAMERA LAVISION
High speed camera Lavision
LABORATORY OF BULK MATERIALS
The camera is equipped with PIV (Particle Image Velocimetry) technique. It is
a non-destructive laser optical measurement technique for research and diagnostics
into flow, turbulence, microfluidics, spray atomization and combustion processes.
www.lavision.de/en/index.php
MEASUREMENTS RESULTS
• Whole velocity fields.
• Distance individual
particles travelled within
time.
• Set of images.
• Visualizations of particle
motion.
• Video sequences.
• Analysis of bitmaps.
Data processing
Flow of the powder mixture
DEM SIMULATIONS
Discharge of bulk materials
LABORATORY OF BULK MATERIALS
The Discrete Element Method is used for simulation of transportation, procedural
and storage processes in the field of renewable resources, metallurgical industries,
energy, pharmaceutical industries etc.
• Models of particles movement, dynamic
properties with regard to the transport system
response.
• Optimization models of particles shapes and
surfaces and equipment.
• Modeling of friction, friction control bulk
materials transfer in limited space with shape
optimization.
Outputs:
Simulation of particles movement
in the redler conveyor
DEM SIMULATIONS
Real model of screw conveyor
LABORATORY OF BULK MATERIALS
The First example of application:
Simulation model of screw conveyor
DEM SIMULATIONS
Simulation of the cooling process in the vertical screw conveyor.
This screw conveyor is used in industry for cooling of cement materials.
Simulation was used for functionality test of device with regards to materials transportation – Filing and discharging
process.
LABORATORY OF BULK MATERIALS
The first example of application:
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The second example of application:
Simulation of material movement in a horizontal screw conveyor.
Will transport capacity be sufficient for the proposed screw speed?
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The third example of application:
Redler feeder
The endless
migratory member
with carrier
Reversing
station
Tensioning
device
Measuring trough
The upper branch
Driving station
The drive unit The lower branch
Virtual 3D model
Real laboratory model of redler conveyor
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The third example of application:
Geometry 1 Geometry 2
• DEM application detects
changes in velocity vectors
and particle movement using
two different geometry
carriers.
• Effect of carrier shape.
Contact surface of particles in a continuous flow of spherical shape materials with two different geometry carriers.
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The fourth example of application – bucket elevator:
Particles movement in the validation bucket elevator.
This transport speed is too quick for evaluation.
• It is possible to
evaluate the
movement of
individual
particles and
understand the
ongoing action.
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The fourth example of application – using high-speed camera:
DEM SIMULATIONS
LABORATORY OF BULK MATERIALS
The fourth example of application – evaluation with the PIV method:
ANOTHER RESEARCH
LABORATORY OF BULK MATERIALS
- Mechanical material properties effect on pelletization
The relation between the mechanical physical properties
of raw input materials and pelletization process. The QbD
methodology was used for this purpose.
- Characterization of metal powders
Metal powder were characterized with size, shape
and distribution of particles, flowabillity, aeration
and compression. For surface topography of
samples (Cu, Al, Fe) EDF Z profile was used.
Microscopic photos and 3D surface plot images of Cu sample
Spruce sawdust
Crushed compost
ANOTHER RESEARCH
LABORATORY OF BULK MATERIALS
- R&D parts of agricultural machinery, 110 TA04021078
Modeling of soil behavior and application of results in view of agricultural
machines.
Innovation solution for geometry of cultivators, plows and
another tools for working with soil.
- Possibilities to improve the mechanical and physical properties of slag
for its secondary utilization
Investigation the possibility of upgrade
of the technological line at the company Calumite.
Agricultural soil sample
Blast furnace slag from various suppliers. 1 - ArcelorMittal Ostrava a.s., 2 - Calumite® Ostrava,
3 - Ukraine (Krivoy Rog), 4 - India (Maharashtra)
1 2 3 4
VSB – Technical University of Ostrava
LABORATORY OF BULK MATERIALS 17. Listopadu 15, Ostrava – Poruba, 708 33,Tel:+420596991283
IČO: 61989100, DIČ: CZ61989100
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